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Hi all --<div><br></div><div>In addition to my previous response, we can schedule a Zoom/Jitsi session if you want me to go into more details what the overall issue here is.</div><div><br></div><div>Otherwise, I documented the situation in the code:</div><div><span style="font-size: 13.3333px"><br></span></div><div><span style="font-size: 13.3333px">https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/97324043f5749da751ad2a060460092cac2e8190/platforms/iOS/vm/OSX/sqSqueakOSXMetalView.m#L238</span><br></div><div><br></div><div><span style="font-size: 13.3333px">https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/97324043f5749da751ad2a060460092cac2e8190/platforms/iOS/vm/OSX/sqSqueakOSXMetalView.m#L260</span><br></div><div><span style="font-size: 13.3333px"><br></span></div><div><span style="font-size: 13.3333px">https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/620</span><br></div><div><span style="font-size: 13.3333px"><br></span></div><div><span style="font-size: 13.3333px">During the last years, we had so many complaints about the Morphic performance on macOS in our University courses. This fix is overdue and very (!) valuable.</span></div><div><span style="font-size: 13.3333px"><br></span></div><div><span style="font-size: 13.3333px">Again, this is an image-side concern. It's not a VM issue. Backwards compatibility can *very easily* be preserved in older images from within those images. See my previous response here.</span></div><div><span style="font-size: 13.3333px"><br></span></div><div><span style="font-size: 13.3333px">Best,</span></div><div><span style="font-size: 13.3333px">Marcel</span></div><div class="mb_sig"></div>
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<p style="color: #AAAAAA; margin-top: 10px;">Am 27.04.2022 09:19:12 schrieb Marcel Taeumel <marcel.taeumel@hpi.de>:</p><div style="font-family:Arial,Helvetica,sans-serif"><div id="__MailbirdStyleContent" style="font-size: 10pt;font-family: Arial;color: #000000;text-align: left" dir="ltr">
Hi Eliot --<div class="mb_sig"></div>
<div><br></div><div>No, this cannot be preserved on the VM side without again introducing that major performance regression that has been there for several years now on the macOS platform. I strongly argue that we keep the VM platform code this way.</div><div><br></div><div>However, it can *very easily* be fixed in most (if not all) older images. Just disable deferred (display) updates as it was not supported on macOS for a very (!) long time:</div><div><br></div><div><div><span style="font-size: 13.3333px"> PasteUpMorph disableDeferredUpdates: true.</span></div><div><span style="font-size: 13.3333px"> Project allMorphicProjects do: [:ea | ea world canvas: nil].</span></div></div><div><br></div><div>> <span style="font-family: Arial, Helvetica, sans-serif;font-size: 13px">To reproduce take e.g. Squeak 6.0 alpha [...]</span></div><div><span style="font-family: Arial, Helvetica, sans-serif;font-size: 13px"><br></span></div><div><span style="font-family: Arial, Helvetica, sans-serif;font-size: 13px">No, </span><span style="font-size: 10pt">Squeak6.0alpha (Trunk) does not show this issue unless it is not an updated image. Still, this update has been part of the update stream for several weeks now.</span></div><div><br></div><div>> [...] <span style="font-family: Arial, Helvetica, sans-serif;font-size: 13px">or the ;ast of the 5.x line [...]</span></div><div><span style="font-family: Arial, Helvetica, sans-serif;font-size: 13px"><br></span></div><div><span style="font-family: Arial, Helvetica, sans-serif;font-size: 13px">The above snippet accounts for this *very easily*. It even works in Squeak 4.x. This is an image-side thing. It always has been. Since 1999. This is not a VM issue.</span></div><div><br></div><div><span style="font-size: 10pt">Best,</span><br></div><div>Marcel</div><div><br></div><div>P.S.: Keep in mind that ST80-style "Fast dragging" is always an alternative in older images:</div><div> Preferences enable: #fastDragWindowForMorphic.</div><blockquote class="history_container" type="cite" style="border-left-style: solid;border-width: 1px;margin-top: 20px;margin-left: 0px;padding-left: 10px;min-width: 500px">
<p style="color: #AAAAAA; margin-top: 10px;">Am 27.04.2022 03:29:31 schrieb Eliot Miranda <eliot.miranda@gmail.com>:</p><div style="font-family:Arial,Helvetica,sans-serif"> Hi Marcel,
<br>
<br> the issue of windows being invisible when dragged in the new VM is a
<br>major bug. The VM needs to be backwards compatible. It souldn't break old
<br>images. So we need to find a way of restoring the default behaviour in
<br>images that don't set the relevant preference.
<br>
<br>To reproduce take e.g. Squeak 6.0 alpha or the ;ast of the 5.x line and
<br>simply try and move a window about As soon as the window starts to move it
<br>disappears and then reappears when the mouse button is released. This must
<br>be fixed.
<br>_,,,^..^,,,_
<br>best, Eliot
<br><div dir="ltr"><div class="gmail_default" style="font-size: 10pt">Hi Marcel,</div><div class="gmail_default" style="font-size: 10pt"><br></div><div class="gmail_default" style="font-size: 10pt"> the issue of windows being invisible when dragged in the new VM is a major bug. The VM needs to be backwards compatible. It souldn't break old images. So we need to find a way of restoring the default behaviour in images that don't set the relevant preference.</div><div class="gmail_default" style="font-size: 10pt"><br></div><div class="gmail_default" style="font-size: 10pt">To reproduce take e.g. Squeak 6.0 alpha or the ;ast of the 5.x line and simply try and move a window about As soon as the window starts to move it disappears and then reappears when the mouse button is released. This must be fixed.</div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><span style="font-size: 10pt;border-collapse: separate"><div>_,,,^..^,,,_<br></div><div>best, Eliot</div></span></div></div></div></div>
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